Expansion-bolt.



N0. 679,363. 4 Patented July 30, |901.

I.'CHURCH.

EXPANSION BDLT.

(Application filed Apr. 12, 1901.1 (No Model.)

/llllllllllllll WITNESSES: phy.

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ISAAC CHURCH, OF TOLEDO, OHIO.

EXPANSION-BOLT.

SPECIFICATION forming part 4of Letters Patent No. 679,363, dated July30, 1901.

Serial No. 55,449. (No model.)

To @ZZ whom, t may concern:`

Be it known that I, ISAAC CHURCH, a citizen of the United States,residing at Toledo, in the county of Lucas and State of Ohio,havcinvented certain new and useful Improve-A ments in Expansion-Bolts; `andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanyingdrawings, and to the figures of reference marked lthereon,which form a part of this specification.

My invention relates to a threaded bolt having a split sleeve andcarrying at its threaded extremity within the sleeve a nut, which by theturn of the bolt is moved longitudinally within the sleeve, thusexpanding the sleeveV and by this means securing the bolt, the nut, andthe sleeve in any suitable cavity prepared to receive the same. In thisclass of devices a difficulty frequently encountered is that the nut,after the sleeve is driven into its socket, becomes slightly displacedand out of axial alinement with the sleeve and bolt. Now the bolt Willeither not enter the nut at all or will enter but slightly,becomingjammed. Under such circumstances it frequently becomes necessary by aslow and tedious process to dig the whole device from its socket.Another objection met with in many devices of this class is that thenut, which is of special form, becomes separated from its accompanyingparts and is mislaid or lost, the whole device now becoming inoperativeand Worthless.

One object of my invention is to overcome the difficulties hereindicated, and more particularly to provide a construction in which thenut is always held in axial alinement with its bolt and sleeve and inwhich the nut cannot become displaced or lost.

A. further object of my invention is to furnish a sleeve of extremeiiexibility which will conform to the walls of the socket in which it isused and to so arrange the sleeve and the nut that the nut cannot turnwith the bolt, thus insuring the rapid. and positive action of the nutand screw.

I attain these objects by means of the devices and arrangement of partshereinafter described and shown, and illustrated in the accompanyingdrawings, in which- Figure l is a side elevation of my device ready foroperation; Fig. 2, an end viewT of the same seen from the right in Fig.l; Fig. 3, a transverse sectional elevation of my device, taken on linex Fig. l; Fig. 4, a central longitudinal sectional elevation yof mydevice; Fig. 5, a transverse section taken on line m2 m2, Fig. et; Fig.6, a transverse section taken on line fr no', Fig. 4; Fig. 7, atransverse section taken on line w3 ac3, Fig. 4; Fig. 8, a sideelevationof my sleeve, hereinafter referred to,detached and before the nut,hereinafter referred to, is secured in place; Fig. 9, a side elevationof the nut, hereinafter referred to, detached; Fig. l0, an endview ofthe same; Fig. 1l, a longitudinal sectional elevation of a modified formof my device; Fig. l2, a transverse sectional elevation of the same,taken online y y, Fig. ll; Fig. 13, an end elevation of thesame seenfrom the right in Fig. l1; Fig. 14, a side elevation of said modiiiedform, showing the sleeve and nut partly entered; Fig. 15, a sideelevation of said nut detached, and Fig. 1G an end view of the same.

Like numerals of reference indicate like parts throughout the drawings.

In the drawings, l is a headed screwthreaded bolt, 2 a nut on said bolt,and 3 a cylindrical sleeve which incloses the nut and part of the boltand is formed of some ductile metal, such as malleable iron. The sleeveis longitudinally slotted, as at et, from near the end next the head ofthe bolt to its opposite end. These slots 4 are narrow and are arrangedaround the sleeve at equidistant intervals, forming a plurality ofintermediate fingers 5, preferably three or four in number, for ordinarysized bolts. The inner Wall of each of the fingers forms the segment ofa circle and is tapered toward its outer eX- tremity. (See Figs. e andll.) The sleeve 3 at its end next the head of the bolt is provided witha head 3a, through which is an axial opening j ust large enough toreceive the bolt. At one side of the sleeve the head and wall of thesleeve are slotted for a short distance toward the opposite end, as at6. Opposite the slot 6 in the interior wall of the sleeve is a deepchannel or groove 7. (See Fig. 3.) The sleeve at its head is providedwith a number of radial projections or points 3b.

IOO

The nut 2 is conical or tapered to correspond with the-bevel of theinner walls of the fingers. This nut may be either circular or angularin transverse section, as may be desired. In case the nut employed iscircular in transverse section the nut has radiallyprojecting lugs 2,which ent-er and engage the walls of the slots 4E; but should the nut bepolygonal in transverse section thelugs 2"L will be unnecessary, for theangles of the nut will rest in the spaces between the walls 4.-, and theinner faces of the fingers 5 may be formed, as illustrated in Fig. 12,to coincide with the transverse contour of the nut.

My device is assembled by slipping the nut into the larger open end ofthe sleeve, which is shown detached in Fig. 8. The bolt is slipped intothe sleeve from the opposite end and screwed into the nut a shortdistance. Now the ends of the fingers which project beyond the nut areby means of a suitable implement or machine bent inwardly at a rightangle toward each other, as at 3. The nut is now confined within thesleeve, so that it cannot be lost, and as the nut is thus secured whilethe bolt is in place the alinement of the sleeve or bolt and the nutmust necessarily be accurate, so that the bolt will now always enter thenut without difficulty.

The operation of my device is as follows: For illustration, a plank isto be secured to a brick wall. A hole just large enough to receive thesleeve is bored in the wall and the sleeve, with the nut, secured inplace as above described, is driven into the hole its full length. Thebolt is now passed through a hole in the plank and into the sleeve andnut. By turning the bolt the nut, which is held against rotation, asabove described, is powerfully drawn toward the head of" the bolt, theinclined surfaces of the bolt and of the fingers being in contact. Nowby the wedge-like action of the nut the lingers are spread apartand-into close engagement with the wall of the hole, thus preventing thevsleeve from being pulled from its socket.

The deep channel or groove 7 at the outer end of the sleeve, togetherwith the slot 6 in the opposite side of the sleeve, permits the sleeveto be by the wedge-like action of the tapered nut spread outwardly, andthe points 3b and the outer wallof the head of the sleeve are alsobrought into close and powerful contact with the wall of the hole orsocket.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1. An expansion-bolt comprising a threaded bolt, a tapered nut thereon,a sleeve inclosing the nut and longitudinal extensions on said sleeveadapted to be bent inwardly behind the nut to prevent its displacement.

2. In an expansion-bolt, a threaded bolt,

a tapered nut on the bolt, a sleeve for the bolt and nut, longitudinalseparated portions in said sleeve whichform ingers, and inwardly-turnedportions at'the extremities of said fingers which overlap the nut andwhich prevent the displacement of the'nut. 3. In an expansion-bolt, asleeve, athreaded bolt and nut, the sleeve and nut havingccrrespondingly-tapered opposing walls, means for preventing the axialrotation of the nut, and inwardly-turned portions of the sleeve at itsend to prevent the displacement of the nut. p

4. In an expansion-bolt, a sleeve, longitudinally-separated portions atone end of said sleeve forming fingers, extensions on said fingersadapted to be bent inwardly, a longitudinal weakened portion at theopposite end of the sleeve formed by 'a deep channel or groove, and aslotted portion in said sleeve opposite said deep channel or groove.

5. In an expansion-bolt, a sleeve,'longi tudinally-separated portions atone end of said sleeve forming iingers, extensions on said fingersadapted to be bent inwardly, a longitudinal weakened portion at theopposite end of the sleeve formed by a deep channel or groove, a slottedportion insaid sleeve opposite said deep channel or groove, and radialpoints 3b on said sleeve near its outer end.

In testimony whereof I affix my signature in presence of two witnesses.

ISAAC CHURCH.

Vitnesses:

CHAS. E. CHITTENDEN, L. E. BROWN.

